Poros was a small river in southeast Gondor flowing into the Anduin. Estimated at being at least 400 Númenórean miles long, it began in the Ephel Dúath (Mountains of Shadow). It then flowed southwest for approximately 300 miles when it turned westward toward the Anduin delta.
It formed the border between Harondor and Ithilien. It could be forded at the Crossings of Poros, (Haudh in Gwanûr) through which the Harad Road ran. It was the site in which the great Battle of the Crossings of Poros which occurred between Gondor and the Haradrim in TA 2885.
|Foreign Language||Translated name|
|Chinese (Hong Kong)||波羅斯河|
|Rivers of Arda|
Adorn | Adurant | Anduin | Aros | Ascar | Brandywine | Brilthor | Brithon | Bruinen | Celebrant | Celebros | Celon | Celos | Ciril | Duilwen | Enchanted river | Entwash | Erui | Esgalduin | Forest River | Gelion | Gilrain | Ginglith | Gladden | Glanduin | Glithui | Greater Gelion | Greyflood | Greylin | Gwathló | Harnen | Isen | Langwell | Lefnui | Legolin | Limlight | Little Gelion | Lune | Malduin | Mering Stream | Mindeb | Mitheithel | Morgulduin | Morthond | Narog | Nenning | Nimrodel | Nunduinë | Poros | Redwater | Ringló | Ringwil | River Running | Rivil | Sarn Gebir | Serni | Sirannon | Siril | Sirion | Sirith | Snowbourn | Taeglin | Thalos | The Water | Withywindle